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Copper electroslag remelting process

A technology of remelting and copper electricity, which is applied in the production field of metal copper, can solve the problem of low yield rate of copper thermal processing, etc., and achieve the effect of meeting the requirements of equipment manufacturing and good copper thermal processing performance

Inactive Publication Date: 2010-06-02
ZHONGYUAN SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a copper electroslag remelting process, the prepared copper has high purity, good as-cast structure, strong high-temperature plasticity, and solves the problem of low yield rate of copper thermal processing

Method used

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  • Copper electroslag remelting process

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Embodiment 1-7

[0018] The slag system corresponding to each embodiment in Table 1 is selected for use respectively. Since MgF 2 and BaCl 2 Both contain crystal water, so before electroslag remelting, bake at 400°C for 20 hours to remove moisture. The melting rate of electroslag remelting copper and the diameter of the corresponding crystallizer are shown in Table 1 respectively; aluminum strips are hung on the wall of the crystallizer for deoxidation, the amount of aluminum added is 0.5kg / ton of remelting metal, and the oxygen content in copper before and after electroslag remelting changes See Table 2, and see Table 3 for organizational changes.

[0019] Table 1

[0020]

[0021] Table 2 Changes in oxygen content before and after electroslag remelting

[0022] Continuous casting slab[0]

Electricity obtained by deoxidizing aluminum during remelting

Slag Ingot[0]

60-70ppm

70-80ppm

[0023] Table 3 Microstructure changes before and after electrosl...

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Abstract

The invention belongs to the metallic copper production field and in particular relates to a copper electroslag resmelting process. The resmelting process adopts a slag system consisting of the following compositions in percentage by weight: 55 to 65 percent of CaF2, 15 to 25 percent of MgF2 or NaF and 15 to 25 percent of BaCl2; and slag materials are fully dried before resmelting. Copper producedby adopting the resmelting process has good thermal processing performance; at the same time, a plurality of small copper ingots are utilized to produce a large copper ingot, thereby meeting the needof equipment manufacturing.

Description

(1) Technical field [0001] The invention belongs to the production field of metallic copper, in particular to a copper electroslag remelting process. (2) Background technology [0002] Copper has good technical properties such as electrical conductivity, thermal conductivity, and corrosion resistance, and is widely used in machinery, shipbuilding, and other fields. However, impurities and coarse and loose as-cast structures in ordinary copper ingots or copper continuous casting slabs often lead to copper cracking during thermal processing, resulting in a reduction in copper thermal processing yield; in addition, some mechanical parts require large copper When the required copper ingot exceeds the capacity of the crucible for smelting copper, it will cause difficulties in smelting. Therefore, how to improve the purity of copper, improve its as-cast structure, improve its high-temperature plasticity to increase the yield of copper thermal processing, and produce large copper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/18
Inventor 熊长聚高宏生
Owner ZHONGYUAN SPECIAL STEEL